Optical device



FIG. 1 is a top view of an optical device showing our new design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a perspective view thereof.

In the drawings, the broken lines are for the purpose of illustrating portions of the optical device that forms no part of the claimed design. 

CLAIM The ornamental design for an optical device, as shown and described. 